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A frictionless piston-cylinder assembly initially contains B m3 of air at A kPa pressure. In this state, a linear spring touches the piston but does not exert any force. Then the air is heated and the piston moves up. Finally, the volume is C m3  and the pressure is D kPa. a) Draw the state change PV diagram, b) Calculate the total work done by the air (kJ), c) Calculate the work done against the spring (kj).

A frictionless piston-cylinder assembly initially contains B m3 of air at A kPa pressure. In this state, a linear spring touches the piston but does not exert any force. Then the air is heated and the piston moves up. Finally, the volume is C m3  and the pressure is D kPa. a) Draw the state change PV diagram, b) Calculate the total work done by the air (kJ), c) Calculate the work done against the spring (kj).

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A frictionless piston-cylinder assembly initially contains B m3 of air at A kPa pressure. In this state, a linear spring touches the piston but does not exert any force. Then the air is heated and the piston moves up. Finally, the volume is C m3  and the pressure is D kPa.
a) Draw the state change PV diagram,
b) Calculate the total work done by the air (kJ),

c) Calculate the work done against the spring (kj).


Starting Pressure A kPa 400 Volume at the beginning B 3 cm 300 AİR Volume in the final C 400 P = A kPa Pressure in the final state kPa 1150 ų = B_m³ II 0°C=273 K AİR kJ kJ kJ Cp = 1,006- kg.K R = 0,287- kg.K Cy = 0,718- kg.K WATER kJ Cp = 4,186 kg.K
Transcribed Image Text:Starting Pressure A kPa 400 Volume at the beginning B 3 cm 300 AİR Volume in the final C 400 P = A kPa Pressure in the final state kPa 1150 ų = B_m³ II 0°C=273 K AİR kJ kJ kJ Cp = 1,006- kg.K R = 0,287- kg.K Cy = 0,718- kg.K WATER kJ Cp = 4,186 kg.K
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